/*
    多行注释
*/
.d1 {
  width: 100px;
  height: 200px;
  background: #ccc;
  border-radius: 5px;
  border: 1px solid red;
}
.d2 {
  width: 100px;
  height: 200px;
  border: 1px solid red;
  background: pink;
}
.d3 {
  background: #999;
}
#d3 {
  background: red;
}
.d1 {
  background: url("../images/p1.jpg");
}
.p1 {
  color: red;
}
.p2 {
  color: blue;
}
.p3 {
  font-size: 50px;
}
/*
    变量的特性
*/
.p1 {
  color: red;
  text-decoration: underline;
}
.p3 {
  color: red;
}
.p3 {
  font-family: 宋体;
}
.p3 {
  text-decoration: overline;
}
.d1 {
  text-decoration: underline;
}
